MSSQL Server Automatic installation With a .Net Project

Question

Dear Madam/Sir
                
                              I have made a simple VB .Net project...for its proper working Microsoft SQL server 2005 or above should be installed in the system.... could you please tell me how to attach MSSQL server installation setup files to my project's setup for automatic installation of MSSQL Server in the system if it is not already installed....then i can automatically install MSSQL Server while installing my Project setup in a system......Please..please..help me...
         
                                                                                                                                                Thank You